Nov 30 2018Nov-30-2018. We are currently experiencing issues with channel5200 and transition_bl datasets.We are currently working on fixing this issue.

Nov 10 2018Nov-10-2018: The bugs in isotropic1024 have been fixed. Servers are functioning normally.

Nov 2 2018Nov-02-2018: Some servers for the isotropic1024 are unstable. We are working to fix the problem.

Oct 9 2018Oct-09-2018: Notice to users of the isotropic turbulence (isotropic1024coarse) dataset: we have recently found a database ingest bug affecting
the isotropic1024coarse dataset for times t > 2.048. The stored data on the two planes x=2π-dx=6.277049 (i=Nx) and y=2π-dy=6.277049 (j=Ny) were set equal to the data on the planes x=2π (i=1) and y=2π (j=1). We are working to remedy the problem.

Jul 18 2018Jul-18-2018. The services will be down and unavailable for around 10 minutes between 14:00-15:00 on July 19, 2018 for important updates. Servers are currently functioning normally.

Jul 3 2018Jul-03-2018. A new dataset (11 snapshots from channel flow at Reτ=5200 from UT Austin) has been added to JHTDB. Servers are currently functioning normally.

May 7 2018May-07-2018: A new dataset (DNS of bypass transitional boundary layer up to Re_theta=1502) has been added to JHTDB. The entire time evolution over a flow-through time (4701 snapshots) is stored.
Servers are functioning normally.

Feb 27 2018Feb-27-2018. Attention: a bug has been identified in the GetVelocityAndPressure function applied to the channel flow that causes the returned pressure values to be at shifted x-locations. The bug has now been corrected. Please contact us if you have any questions about this issue

Jan 31 2018January-31-2018. A new dataset (5 snapshots from rotating stratified turbulence on a 4096-cubed domain generated using the GHOST code) has been added to JHTDB. Servers are currently functioning normally

Nov 6 20176-November-2017. A new dataset (a single snapshot from isotropic turbulence on a 4096-cubed domain generated by Georgia Tech researchers) has been added to JHTDB. Also, a new getFunction (getInvariant) now allows to evaluate the square of strain and rotation rate tensors. Some other minor bugs were fixed. Servers are currently functioning normally.

Oct 12 201712 October 2017:Servers are currently functioning normally. Note that the getThreshold functionality when invoked for Q criterion is returning |Q| rather that Q. We will soon fix this problem.

Aug 9 20179 August, 2017: 9 August 2017:We are currently having issues with the cutout service. We are trying to resolve this quickly. Smaller chunks of data can still be accessed through the cutout service, for larger data please use the other access methods for now.

May 22 201722 May, 2017: We are currently experiencing disk problems on one of our servers. The channel flow and mixing datasets are not functioning normally at this time. We are working to correct the issue.

May 18 201718 May, 2017: We will be patching servers from 10AM EDT to 12PM EDT on 19 May 2017. Services may not work during this period.

May 2 2017We will be patching servers from 10am to 12pm on 2 May. This may cause service interruptions during this time.

Feb 21 2017We will be patching servers on 21 February beginning at 12:00 EST, therefore some services may not be available for short periods of times.

Nov 20 2016GetPosition currently does not work on the extended dataset.

Oct 19 2016NOTICE: 19 October, 2016: We have extended our Isotropic 1024 coarse dataset to time 10.056. Please let us know at turbulence@lists.johnshopkins.edu if you run into any issues with this updated dataset. We are currently testing particle tracking in this new region.

Jul 18 2016 Channel Database nodes are experiencing hardware failures. We are working to resolve this quickly, but channel data may be unavailable.

Jun 13 2016We are currently experiencing networking issues within our server network. This is leading to timeouts on data access. We are currently working on fixing this issue.

Apr 26 2016We are currently experiencing issues with our servers, and some queries may time out. We are currently working on resolving the problems.

Feb 23 2016The following announcement pertains to getPosition queries on the channel dataset using Lag4, Lag6, or Lag8 spatial interpolation, performed on or before February 23, 2016. On this date, a bug was identified in the database code. The effect of the bug was to produce an inaccurate spatial interpolation of the velocities used to update the Lagrangian position. The error occurred on every 8th y-location, in the upper half of the channel (0 < y < 1). The bug has been fixed on February 23, 2016. We regret any user inconvenience this may have caused.

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